双眼倾斜效应中频率和相对距离乘积的恒常性

RELATIVE SPACIAL FREQUENCY CONSTANCY IN BINOCULAR TILT EFFECT

双眼协同的功能不仅是扩大视野,而且更为重要的是人和动物获得对环境特有的立体感觉。但立体视觉信息处理机制至今尚不清楚,有待深入研究。 本文利用自己研制的一种多功能立体图形发生器产生的亮度以正弦波调制的光栅条纹作为刺激图形,设计并做了一系列有关频差倾斜现象;其次,分别对不同中心频率和不同观察距离下,左、右刺激器处于与被试者不同距离下频差倾斜观象中的频差与倾斜度的关系进行了研究。结果表明,对于频率差分析存在着频率和相对远近乘积的恒常性,这是判断物体精细凸凹的一种global stereopsis性质的心理规律。

The function of binocular Synergism is not only extending the field of vision, but also more important to obtain the stereopsis. But the mechanism of the information processing of binocular stereoscopic vision was not known well at present. It is remained to be studied.We have investigated binocular depth perception by using stereoscopic presentation of two gratings of identical cycles, but at different distance from two eyes of the observer. The orientation of tilt of stereoscopic image from the frontal plane was in accordance with that effect first reported by Blakemore. The relation between the angle of tilt and diffrequency ratio were proved quantitatively, and the results show that there may exist relative spatial frequency multiple distance constancy in analysis of diffrequency in the two eyes. We believe that this was a new kind of psychological law for global stereopsis, which determine relative depth of one object.